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WICHITA, Kan. (AP) — A man accused of plotting a suicide bomb attack at a Kansas airport was "well on his way" to becoming a violent terrorist before authorities began investigating him, federal prosecutors argued Monday.

Major security vulnerabilities in the Federal Aviation Administration's information systems are putting air traffic control programs, along with plane passengers, at risk, two U.S. senators said in a letter to the transportation secretary on Monday. "These vulnerabilities have potential to compromise the safety and efficiency of the national airspace system, which the traveling public relies on each and every day," Senator Bill Nelson, a Florida Democrat, and Senator John Thune, a South Dakota Republican, wrote to Transportation Secretary Anthony Foxx. In a separate statement, Nelson said a hacker could cause "delays, near misses or potentially even a disaster." Foxx will testify on Tuesday before the Senate Transportation Committee, which Thune chairs.

LOS ANGELES (AP) — The Skid Row section of Los Angeles, where police officers fatally shot a homeless man on Sunday during a fierce struggle captured on video, is notorious as one of the nation's most gritty and depressing areas.

By Kevin Murphy OLATHE, Kan (Reuters) - A white supremacist charged with three killings outside two Jewish centers in a Kansas City suburb last April turned his gun on at least three other people as his shooting spree unfolded, witnesses testified in a hearing on Monday. The hearing on whether Frazier Glenn Cross Jr., 74, should stand trial on capital murder charges resumes on Tuesday. Cross, also known as Glenn Miller, was shackled and seated in a wheelchair during the hearing. He was known to law enforcement as a former senior member of the Ku Klux Klan who had expressed hatred for Jewish people.

ALBUQUERQUE, N.M. (AP) — New assessment tests that have angered parents and teachers across the nation prompted walkouts Monday by hundreds of high school students in New Mexico who had been set to take the exams.

COLUMBUS, Ohio (AP) — Ohio is suing oil and gas company BP for more than $33 million, alleging it double dipped by taking state funds and money from insurers to clean up accidental leaks from underground storage tanks at hundreds of its gas stations around the state.

OLATHE, Kan. (AP) — A man accused of fatally shooting three people at Jewish sites in Kansas declared "Heil Hitler!" and asked how many Jews he had killed after the attacks, a police officer testified Monday during a hearing in which the man's apology to some survivors was rejected.

JACKSONVILLE, Fla. (AP) — A tractor-trailer slammed into an SUV from behind, causing a fiery crash that killed four people and shut down southbound lanes of an Interstate highway perimeter around Jacksonville, Florida.

By Andrea Shalal WASHINGTON (Reuters) - Lockheed Martin Corp, the Pentagon's No. 1 supplier, said it has seen a "sea change" in demand for cyber security services in critical infrastructure areas such as energy, oil and gas, and financial institutions over the past 18 months. Increased media coverage, more sharing of data about cyber attacks, tighter government regulations, and growing concerns about the fiduciary duties of corporate boards and chief executives have stoked that demand over the past 18 months, said Chandra McMahon, vice president of commercial markets for Lockheed's Information Systems security services. McMahon told Reuters in a telephone interview that Lockheed's commercial cyber division had doubled its clients over the past year alone, and the company expected to generate double digit growth over the next five years. She welcomed the increased engagement of corporate boards and C-suites, but said it was critical to remain vigilant and also to hire more skilled cyber experts.

NEW YORK (AP) — The U.S. Supreme Court this week hears a challenge to President Barack Obama's health care overhaul. If successful, the lawsuit would cripple Obama's prized domestic achievement, a program that has brought the U.S. as close as it has ever come to universal health care. The Affordable Care Act passed Congress in 2010 without a single Republican vote in favor. An explanation of the legal case: